| Extraordinary Transport Behaviors of La0.67Sr0.33Mn1-xCrxO3（0.00≤x ≤0.30） |
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| 引用本文： | 宋启祥,刘宁,严国清,童伟,孙阳.Extraordinary Transport Behaviors of La0.67Sr0.33Mn1-xCrxO3（0.00≤x ≤0.30）[J].中国稀土学报(英文版),2006,24(3):332-336. |
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| 作者姓名： | 宋启祥 刘宁 严国清 童伟 孙阳 |
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| 作者单位： | [1]Materials Laboratory, Suzhou College, Suzhou 234000, China [2]Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （19934003）, the State Key Project of Fundamental Research of China （001CB610604） and the Natural Science Foundation of the Anhui Higher Education Institutions of China （ 2006KJ266B ） |
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| 摘 要： | M-T curves, ρ-T curves and MR-T curves of La0.67Sr0.33Mn1-xCrxO3（0.00≤ x ≤0.30） were studied. Experimental results indicate that the substitution of Cr on Mn sites is impotent in driving Tc, but with an increase of Cr content, there appear two peaks in resistivity and MR response, thus the temperature range of CMR response is significantly broadened. The extraordinary transport behavior and the abnormal CMR effect could be the results of coexistence and competition of Mn^3 ＋ -O-Mn^4 ＋ and Mn^3＋ -O-Cr^3 ＋ channels.
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| 关 键 词： | 相干性物理 CMR 多晶体 稀土 永磁材料 |
| 文章编号： | 1002-0721（2006）03-0332-05 |
| 收稿时间： | 2005-04-20 |
| 修稿时间： | 2005-10-09 |
Extraordinary Transport Behaviors of La0.67Sr0.33Mn1-xCrxO3(0.00≤x≤0.30) |
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| Qixiang , Ning Liu, Guoqing Yan, Wei Tong,Yong Sun.Extraordinary Transport Behaviors of La0.67Sr0.33Mn1-xCrxO3(0.00≤x≤0.30)[J].Journal of Rare Earths,2006,24(3):332-336. |
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| Authors: | Qixiang Ning Liu Guoqing Yan Wei Tong Yong Sun |
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| Affiliation: | aMaterials Laboratory, Suzhou College, Suzhou 234000, China;bStructure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | M-T curves, ρ-T curves and MR-T curves of La0.67Sr0.33Mn1-xCrx O3 (0.00≤x≤0.30) were studied. Experimental results indicate that the substitution of Cr on Mn sites is impotent in driving TC, but with an increase of Cr content, there appear two peaks in resistivity and MR response, thus the temperature range of CMR response is significantly broadened. The extraordinary transport behavior and the abnormal CMR effect could be the results of coexistence and competition of Mn3+ -O-Mn4+ and Mn3+ -O-Cr3+ channels. |
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| Keywords: | coherence physics transport CMR effect polycrystalline rare earths |
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